21 replies to this topic

[TerrA LX]

cant remember port sizes off hand but if you say their bigger then their bigger, smooth is not good for carb fuel attomisation.
looks like some match porting has been performed.
looks like a long time between oil changes and are you running inhibitor, the water jackets look rusty.
who was the rocker gear for wear?

[TerrA LX]

though i did find one bent pushrod.

you better find the cause of that as they dont bend easy under normal conditions.
that would be your "ticking" problem.
closly examine the rockers esp. the one from the bent rod and replace both rockers and fulcrums if suspect.
while you got it in that state, can you slide any lifters out, if you do, put them back where they came from. if you cant, their mushroomed (read worn).

[TerrA LX]

i could be wrong but they look like blue motor heads with standard springs and retainers. good for about 5500rpm or six max.
slack in the cable is not as important as is getting WOT when the pedal hits the metal.
i will measure some for you next week if no one comes forth in the mean time.

Edited by ALX76, 12 November 2006 - 09:42 PM.

[TerrA LX]

pretty sure thier the same.
be accurate with the measurements as there will only be about 1.5mm width and 3mm height difference and compair your measure points to allow for match porting.

[TerrA LX]

they appear to be standard heads going by choppers quote but as stated prev. they appear to have been match ported at some stage.
match porting just concerns the port opening and does not extend into the port "tunnel" itself.
match porting is done to to achieve a uniform step at the port face to the manifold.

so they are black heads eh, probable the best of the standard heads from holden, standard large valve (L34 type).

Edited by ALX76, 12 November 2006 - 11:29 PM.

[TerrA LX]

Yella if you wouldnt mind id like the L34 inlet and exhaust measurements, also if one of you could measure across the widest part of the combustion chamber.
cheers.